Oranjestad, August 14, 2014 - SeaWorld Entertainment shares lost more than a third of their value after the theme-park operator slashed forecasts amid a controversy over its killer whale shows that has hurt attendance.

The shares fell 33 percent after the company also reported lower-than-expected profit and revenue for the second quarter ended June 30.

Protests against orca shows at SeaWorld’s amusement parks intensified after a 2013 film, “Blackfish,” documented the killing of a trainer at the company’s Orlando park in 2010 by the whales. A bill has been introduced in California proposing a ban on using killer whales in entertainment shows at amusement parks.